2223521 has 2 divisors, whose sum is σ = 2223522. Its totient is φ = 2223520.

The previous prime is 2223503. The next prime is 2223541. The reversal of 2223521 is 1253222.

2223521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 6400 = 1489^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223521 - 2⁶ = 2223457 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁵ + 2¹³ + 2¹⁷ + 3³ + 5⁹ + 2¹⁷ + 1 .

It is a self number, because there is not a number n which added to its sum of digits gives 2223521.

It is not a weakly prime, because it can be changed into another prime (2223541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111760 + 1111761.

It is an arithmetic number, because the mean of its divisors is an integer number (1111761).

2^2223521 is an apocalyptic number.

It is an amenable number.

2223521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2223521 is an equidigital number, since it uses as much as digits as its factorization.

2223521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 17.

The square root of 2223521 is about 1491.1475446783. The cubic root of 2223521 is about 130.5210058033.

Adding to 2223521 its reverse (1253222), we get a palindrome (3476743).

Subtracting from 2223521 its reverse (1253222), we obtain a cube (970299 = 99³).

It can be divided in two parts, 2223 and 521, that added together give a cube (2744 = 14³).

The spelling of 2223521 in words is "two million, two hundred twenty-three thousand, five hundred twenty-one".